Rope-clutch for hoists.



R. DAVIS.

ROPE CLUTCH FOR HOISTS.

APPLICATION FILED MAB. 1, 1913 1,105,624. a ed Aug. 4, 1914 games. Inz/en 607".

Jaw Fay ,Da Vzls.

ROY DAVIS, LONG BEACILGALIFORNIA.

ROPE-CLUTCH FOR HOISTS.

Specification of Letters Patent- Application filed March 7, 1913.

Patei'ited Aug. 4, 1914. Serial No. 753,882.

To all "whom it may concern Be it known that I, Roy DAVIS, a citizen ofthe United States, residing at Long Beach, in the county of Los Angelesand State of Calitornia, have invented a new and useful Rope-Clutch :torHoists, of which the follow ing is a specification.

My invention relates to improvements .in rope clutch for hoists, and theobject of my invention to provide a simple and eltectivc device forclutching and holding a hoist at any stage and simple means to releasethe same. I attain this object by means of the mechanism illustrated in.the accompanying drawings, in which Figure 1 is a perspective view 01 myclutch attached to a hoist. Fig. 2 is a vertical sec tional view of apart of the clutch showing it in a loose, and in a gripping )osition.Fig. 3 is a cross sectional view of the clutch on the line X"-X Fig. 1.

My clutch is composed (if the sleeve 1. around which is the collar 5with the lugs ti perforated to receive the bolt 7. inside the sleeve 1is the semieylimlrical plate ii pro vided with the pins 4t which setloosely in the holes 2 in the sleeve 1. The arm S) has its lower endtermed into a cam l) which is pivc-tally mounted between the lugs 6 ofthe collar 5 by means of the bolt 7 and the nut 8, and to its upper endis pivotally secured the collar 11. by means of the bolt 12 and the nut13. The hand end ot the rope 1-1 is run through the collar 1 and overthe pulley '1 3 to the hoist end which is run through the collar 11 andprovided with the loop 15.

The arm 9 is upwardly inclined and in the lower end is the hole 10 inwhich is secured the hand line 17. lVhcn. the rope 141 is pulleddownward, it slides loosely through the sleeve 1 as the loop rises andtakes the clutch up with it, the t'riction ot the cam 5) being released,but if at any point, the rope 1 1-. is allowed to slack, the weight onthe hoist loop 15 will pull the upper end of the arm 8) down and causethe earn 9 to press against the plate 3 and the latter against the rope14, thus stopping the motion of the rope. When the weight has beenhoisted and removed, the loop 15 and the sleeve 1 may be caused todescend by pulling the hand line 17, the latter being secured to the arm9 at a point close to its pivotal point, so that in pulling on the handline, not enough pressure can be exerted on the cam as to cause it tolock the rope in the clutch. I may also place this hand line and secureit at any convenient point on the arm or the sleeve.

What. I claim as my invention and desire Letters Patent for,

1. A rope clutch con'iprising a sleeve, a semi-cylindrical plate looselymounted in said sleeve, a collar on said sleeve having lugs on one sidethereof, an inclined arm pivoted at its lower end between and to saidlugs, said lower end having a cam shaped portion adapted to extendthrough an opening in said sleeve and to engage said plate, a collarpivoted to the upper end of said arm and adapted to be connecttal withthe hoist ing end ot. a rope, and a hand line secured to and near thepivotal point ol. said arm, in combination, as and for the purposespecitied.

A rope clutch having an elongated vertical sleeve adapted to slide on ahoisting rope, a scmi-cylindrical plate loosely monnted within and atone side of said sleeve adapted to 'lrictionally engage said rope andlock said sleeve against movement thereon, a collar around and securedto said sleeve near its center having lugs projecting outwardlytherefrom, an arm normally inclined from and pivoted between and to saidlugs at its lower end, said lower end having a cam shaped portionadapted to extend through an opening in said sleeve and engage saidplate for increasing or diminishing the triction between said plate andsaid rope, a collar pivoted to the upper end of said arm adapted to beconnected with the hoisting end ot a rope, and a hand line secured tosaid arm near its pivotal point for regulating the position ol. thesleeve on the rope, as described.

ROY DAVIS.

lVitncsses J. I). Boons'riivnn, M. E. KiNNm'.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0."

